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Given a Bundle, how can I find what extensions it provides? [message #754330]

Wed, 02 November 2011 08:16

Alexey Romanov

Messages: 263
Registered: May 2010

Senior Member

I can install plug-ins at the run time:

Bundle bundle = getBundleContext().installBundle(location);
bundle.start();

This gives me a Bundle object.

Now, how can I find what extensions are defined in its plugin.xml? IExtensionRegistry doesn't seem to have any useful methods for this.

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Re: Given a Bundle, how can I find what extensions it provides? [message #754423 is a reply to message #754330]

Wed, 02 November 2011 14:07

Paul Webster

Messages: 6859
Registered: July 2009
Location: Ottawa

Senior Member

I asked around and you can ask for all extensions for an extension point and filter for the one contributor (I think I saw you post that on stackoverflow.com).

The other option is to ask for all extensions from a contributor and filter that:

IContributor ic = new IContributor() {
  public String getName() {
    return "com.example.plugin";
  }
};
IExtension[] extensions = extensionRegistry.getExtensions(ic);

Then pick out extensions for the extension point in question.

If you are in a dynamic scenario where bundles are being installed, you can always use the IRegistryEventListener. It would be fired with all of the IExtensions that were just added.

Later,
PW

Paul Webster
http://wiki.eclipse.org/Platform_Command_Framework
http://wiki.eclipse.org/Command_Core_Expressions
http://wiki.eclipse.org/Menu_Contributions

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Re: Given a Bundle, how can I find what extensions it provides? [message #754433 is a reply to message #754423]

Wed, 02 November 2011 14:15

Alexey Romanov

Messages: 263
Registered: May 2010

Senior Member

Quote:

The other option is to ask for all extensions from a contributor and filter that

Oh, so the contributors are just checked by name and not by identity? Thanks!
Quote:

If you are in a dynamic scenario where bundles are being installed, you can always use the IRegistryEventListener. It would be fired with all of the IExtensions that were just added.

Yes, I've considered doing that, but thought that since Eclipse keeps this information anyway (to remove extensions on bundle uninstallation) I should check if it's accessible more easily.

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